"use client";

import { useState, useEffect } from 'react';
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label';
import { useSession } from 'next-auth/react';
import { toast } from 'sonner';
import { Settings, User, Bell, Shield, Trash2 } from 'lucide-react';
import { useParams, useRouter } from 'next/navigation';
import { WorkspaceKeysPanel } from '@/components/workspace/WorkspaceKeysPanel';
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
  AlertDialogTrigger,
} from "@/components/ui/alert-dialog";

interface WorkspaceSettings {
  name: string;
  description: string;
  createdAt: any;
}

export default function SettingsPage() {
  const params = useParams();
  const router = useRouter();
  const workspace = params.workspace as string;
  const { data: session, status } = useSession();
  const [settings, setSettings] = useState<WorkspaceSettings | null>(null);
  const [loading, setLoading] = useState(true);
  const [saving, setSaving] = useState(false);
  const [displayName, setDisplayName] = useState('');
  const [email, setEmail] = useState('');

  useEffect(() => {
    if (status === 'loading') return;
    setDisplayName(session?.user?.name ?? '');
    setEmail(session?.user?.email ?? '');
    setLoading(false);
  }, [session, status]);

  const handleSaveProfile = async () => {
    setSaving(true);
    try {
      if (!session?.user) {
        toast.error('Please sign in');
        return;
      }
      toast.success('Profile updated successfully');
    } catch (error) {
      console.error('Error saving profile:', error);
      toast.error('Failed to update profile');
    } finally {
      setSaving(false);
    }
  };

  return (
    <div className="flex h-full flex-col overflow-auto">
      <div className="flex-1 p-8 space-y-8 max-w-4xl">
        {/* Header */}
        <div>
          <h1 className="text-4xl font-bold mb-2">Settings</h1>
          <p className="text-muted-foreground text-lg">
            Manage your workspace and account preferences
          </p>
        </div>

        {/* Profile Settings */}
        <Card>
          <CardHeader>
            <div className="flex items-center gap-2">
              <User className="h-5 w-5" />
              <CardTitle>Profile</CardTitle>
            </div>
            <CardDescription>Update your personal information</CardDescription>
          </CardHeader>
          <CardContent className="space-y-4">
            <div className="space-y-2">
              <Label htmlFor="displayName">Display Name</Label>
              <Input
                id="displayName"
                value={displayName}
                onChange={(e) => setDisplayName(e.target.value)}
                placeholder="Your display name"
              />
            </div>
            <div className="space-y-2">
              <Label htmlFor="email">Email</Label>
              <Input
                id="email"
                type="email"
                value={email}
                disabled
                className="opacity-60 cursor-not-allowed"
              />
              <p className="text-xs text-muted-foreground">
                Email cannot be changed directly. Contact support if needed.
              </p>
            </div>
            <Button onClick={handleSaveProfile} disabled={saving}>
              {saving ? 'Saving...' : 'Save Changes'}
            </Button>
          </CardContent>
        </Card>

        {/* Workspace Settings */}
        <Card>
          <CardHeader>
            <div className="flex items-center gap-2">
              <Settings className="h-5 w-5" />
              <CardTitle>Workspace</CardTitle>
            </div>
            <CardDescription>Configure workspace settings</CardDescription>
          </CardHeader>
          <CardContent className="space-y-4">
            <div className="space-y-2">
              <Label>Workspace Name</Label>
              <Input
                value={workspace}
                disabled
                className="opacity-60 cursor-not-allowed"
              />
              <p className="text-xs text-muted-foreground">
                Workspace identifier cannot be changed after creation
              </p>
            </div>
            {settings?.createdAt && (
              <div className="space-y-2">
                <Label>Created</Label>
                <p className="text-sm">
                  {new Date(settings.createdAt._seconds * 1000).toLocaleDateString('en-US', {
                    year: 'numeric',
                    month: 'long',
                    day: 'numeric'
                  })}
                </p>
              </div>
            )}
          </CardContent>
        </Card>

        {/* Workspace tenancy + AI access keys */}
        <WorkspaceKeysPanel workspaceSlug={workspace} />

        {/* Notifications */}
        <Card>
          <CardHeader>
            <div className="flex items-center gap-2">
              <Bell className="h-5 w-5" />
              <CardTitle>Notifications</CardTitle>
            </div>
            <CardDescription>Manage your notification preferences</CardDescription>
          </CardHeader>
          <CardContent>
            <div className="space-y-4">
              <div className="flex items-center justify-between">
                <div>
                  <p className="font-medium">Email Notifications</p>
                  <p className="text-sm text-muted-foreground">Receive updates via email</p>
                </div>
                <Button variant="outline" disabled>
                  Coming Soon
                </Button>
              </div>
              <div className="flex items-center justify-between">
                <div>
                  <p className="font-medium">Session Summaries</p>
                  <p className="text-sm text-muted-foreground">Daily AI session summaries</p>
                </div>
                <Button variant="outline" disabled>
                  Coming Soon
                </Button>
              </div>
            </div>
          </CardContent>
        </Card>

        {/* Security */}
        <Card>
          <CardHeader>
            <div className="flex items-center gap-2">
              <Shield className="h-5 w-5" />
              <CardTitle>Security</CardTitle>
            </div>
            <CardDescription>Manage your account security</CardDescription>
          </CardHeader>
          <CardContent className="space-y-4">
            <div className="flex items-center justify-between">
              <div>
                <p className="font-medium">Change Password</p>
                <p className="text-sm text-muted-foreground">Update your account password</p>
              </div>
              <Button variant="outline" disabled>
                Coming Soon
              </Button>
            </div>
            <div className="flex items-center justify-between">
              <div>
                <p className="font-medium">Two-Factor Authentication</p>
                <p className="text-sm text-muted-foreground">Add an extra layer of security</p>
              </div>
              <Button variant="outline" disabled>
                Coming Soon
              </Button>
            </div>
          </CardContent>
        </Card>

        {/* Danger Zone */}
        <Card className="border-red-500/50">
          <CardHeader>
            <div className="flex items-center gap-2">
              <Trash2 className="h-5 w-5 text-red-500" />
              <CardTitle className="text-red-500">Danger Zone</CardTitle>
            </div>
            <CardDescription>Irreversible and destructive actions</CardDescription>
          </CardHeader>
          <CardContent>
            <AlertDialog>
              <AlertDialogTrigger asChild>
                <Button variant="destructive" disabled>
                  Delete Workspace
                </Button>
              </AlertDialogTrigger>
              <AlertDialogContent>
                <AlertDialogHeader>
                  <AlertDialogTitle>Are you absolutely sure?</AlertDialogTitle>
                  <AlertDialogDescription>
                    This action cannot be undone. This will permanently delete your workspace and all associated data.
                  </AlertDialogDescription>
                </AlertDialogHeader>
                <AlertDialogFooter>
                  <AlertDialogCancel>Cancel</AlertDialogCancel>
                  <AlertDialogAction className="bg-red-600 hover:bg-red-700">
                    Delete Workspace
                  </AlertDialogAction>
                </AlertDialogFooter>
              </AlertDialogContent>
            </AlertDialog>
          </CardContent>
        </Card>
      </div>
    </div>
  );
}